http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png
Irradiation behaviour of advanced fuel elements for the helium-cooled advanced high temperature reactor (HTR)



1990
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich

Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Spezielle Berichte / Forschungszentrum Jülich 565, 17 p. ()

Please use a persistent id in citations:

Report No.: Juel-Spez-0565

Abstract: The design of modern HTRs is based on high quality fuel. A research & development programme has demonstrated the satisfactory performance in fuel manufacturing, irradiation testing and accident condition testing of irradiated fuel elements. This report describes the fuel particles with their low-enriched UO2 kernels and TRISO coating, i. e. a sequence of pyrocarbon, silicon carbide, and pyrocarbon coating layers, as well as the spherical fuel element. Testing was performed in a generic programme satisfying the requirements of both the HTR-MODUL and the HTR 500. With a coating failure fraction less than 2 x10$^{-5}$ at the 95% confidence level, the results of the irradiation experiments surpassed the design targets. Maximum accident temperatures in small, modular HTRs remain below 1600°C, even in the case of unrestricted core heatup after depressurization. Here, it was demonstrated that modern TRISO fuels retain all safety-relevant fission products and that the fuel does not suffer irreversible changes. Isothermal heating tests have been extended to 1800°C to show performance margins. Ramp tests to 2500°C demonstrate the limits of present fuel materials. A long-term programm is planned to improve the statistical significance of presently available results and to narrow remaining uncertainty limits.


Contributing Institute(s):
  1. Publikationen vor 2000 (PRE-2000)
Research Program(s):
  1. 899 - ohne Topic (POF3-899) (POF3-899)

Database coverage:
OpenAccess
Click to display QR Code for this record

The record appears in these collections:
Document types > Reports > Reports
Workflow collections > Public records
Institute Collections > Retrocat
Publications database
Open Access

 Record created 2016-11-23, last modified 2021-01-29


OpenAccess:
Download fulltext PDF
External link:
Download fulltextFulltext by OpenAccess repository
Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)